EvgenProdTools: replace static string with constant

Thread-checker fix.

Build area was cleaned as per request posted in the DB. The full software build will be performed

This merge request affects 1 package:

• Generators/EvgenProdTools

This merge request affects 1 file:

• Generators/EvgenProdTools/src/TestHepMC.cxx

added Generators master review-pending-level-1 labels

The system determined that CI tests (with names matching "^CITest_Trigger.*$") are not needed for this code change. They are not run. This is not an indicator to restart the job.

CI Result SUCCESS (hash fada3433)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 61490]

Looks good, approving - L1

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 44de5bb9

added sweep:ignore label